A whole system restart is likely a kernel bug. Next time it happens, please run:
journalctl -b-1 > prevboot.txt and attach the resulting text file here. ** Package changed: gnome-shell (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1968255 Title: Sudden, unexpected restart of the whole system. Reporting after automatic restart Status in linux package in Ubuntu: Incomplete Bug description: Using browser the system just stopped and restarted. Browser hardware acceleration option was on. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: gnome-shell 42.0-1ubuntu1 ProcVersionSignature: Ubuntu 5.15.0-25.25-generic 5.15.30 Uname: Linux 5.15.0-25-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu80 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Fri Apr 8 07:25:13 2022 DisplayManager: gdm3 InstallationDate: Installed on 2018-08-02 (1344 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) RelatedPackageVersions: mutter-common 42.0-1ubuntu1 SourcePackage: gnome-shell UpgradeStatus: Upgraded to jammy on 2022-04-07 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1968255/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp